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Retrieving a sequence

To start the task of sequence analysis, the first thing we need is a sequence of DNA or protein. Such sequence data can be retrieved either by visiting the database hosting page via a browser or by accessing the data mart form within R via corresponding commands/functions. We had a look at some of the methods in the previous chapter. In this recipe, we introduce some more methods to retrieve a sequence.

Getting ready

Retrieving sequences from databases requires the following:

Access to the database via the Internet

A sequence ID or keyword for searching

The biomaRt and seqinr libraries installed and loaded in the R session

How to do it…

To fetch a sequence of the data via R, perform the following steps:

Get a sequence of the data. ...

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